Household sifter



Patented Jan. 1, 1929.

-air star CHARLES F. PFALZGRAF, 0F BALTIMORE, MARYLAND, ASS IG-NOR TO BALTIMORE STAMPING & ENAMELING 00., OF BALTIMORE, MARYLAND, A CORPOBATION OF MARYLAND.

HOUSEHOLD srrmnn.

Application filed April 17, 1928. Serial No. 270,641.

out having direct connection therewith, and

to also mount the crank-bar in the shell of the sifter in an exceedingly simple and cheap manner.

With these main objects in view, the invention is illustrated in the accompanying drawing, wherein,-

Fig. 1 shows a Vertical longitudinal section through the sifter,the section bemg taken on the line 11 of Fig. 2.

Fig. 2 illustrates the sifter-shell partly in side View with a fragment of the same broken away and shows the agitator and crank-bar in vertical cross-section, and

Fig. 3 shows an enlarged perspective detail of a portion of the agitator and a portion of the crank-bar on which the same is mounted.

Referring to the drawing, the numeral 5 designates the cylindric shell of the sifter which in this instance is shown with the usual ornamental and circumferential stiffening beads 6, and which also has an annular ci-rcumferential fold 7 in which the screeningwire 8 is secured to hold it in place on the interior of the shell.

The screen 8 is of the usual concavo-convex form so that an agitator may be revolved over the concave upper side thereof to work the flour or other material through the screen.

At diametrically opposite sides the shell 5 is provided with hearing openings 9 and 10 which are located in the same horizontal plane and above the screen in which the crank-bar 11 is to be mounted, as will now be explained. V j

The crank-bar 11 is formed of a single piece of spring wire of sufficient stiffness to serve its purpose and has a short straight and horizontal bearing-end 12; a bowed intermediate portion 18; an intermediate short horizontal bearing portion 1 1 and a crank-end 15. j

The short bearing-end 12 projects through and has bearing in the opening 9 in one side of the shell-wall while the intermediate bearing portion 1 1 extends through the opening 10 in the opposite side of the shell wall and has bearing therein. 7

It will be noted that a shoulder 16 is formed between the straight end 12 and the bowed portion 18 of the crank-bar and that a similar shoulder 17 is formed between the bearing-portion 14 and the said bowed portion. The utility of these shoulders'16and v 17 will presently be explained.

The agitator is formed of a series of arched bars 18 each of which has a head 19 at each of its ends and all of the headsat one side of the agitator are brought into register and clipped together by tangs 20 of one headengaging the others.

These registered and clipped-together heads 19 of the agitators have bearing-openings 21 therethrough. 7

It will further be noted that each agitator bar has a bend therein near one of its end heads which produces an inwardly-projecting shoulder 22 and these shoulders project inwardly far enough to extend across the path of the bowed portion 13 of the crankbar adjacent to the shoulders 16 and 17 there of. These shoulders 16 and 17 are utilized in my structure to eifect a rotation of the agitator from the bowed portion of the crankbar regardless whether the crank be turned in one direction or the other.

The two horizontal bearing-portions 12 and 1 1 of the crank-bar serve to carry the heads 19 of the agitator, while the shoulders 16 and'17 thereof keep the agitator-bars 18' spread and arched.

The intermediate bowed portion 13 of the crank-bar, because of its tendency to spread the bearing-portions 12 and 14 apart keeps the end 12 of the bar in its bearing opening 9 of the shell and thus eliminates all necessity for nuts or other means on'the outer end 12 of the bar to keep the latter from withdrawing from its bearing. 7 Moreover, it will be seen that as the crankbar is free of all obstruction, other than the several bends therein, it may readily be threaded through the bearing opening 10 at one side of the shell; then through the openings 21 in the heads at one side of the agitator; then sprung and passed through the entered in the bearing-opening 9 in the'oppo- I site side of the shell,-the springing of the bar because of its bowed-portion v13 enabling openings the operation of insertion or removal to be readily effected, and all because of the cheap and simple construction of said crank-bar.

A handle 23 of conventional form is shown attached to the shell.

IIaving'described my invention, I claiin,-

1. In a sitter, thecoinbination with a cylindric shell of a scini-cylindric screen sustained in said shell a crank-bar having horizontal 7 bearing portions mounted in opposite Walls of the shell said crank-bar being bowed between the said bearing-portions,- an agitatormounted on the horizontal bearing portions of said crank-bar at opposite sides of said bowed portion thereofand means for turn ing the agitator from the bowed portion of the crank-shaft. I

2. In a sitter, the-combination witha'cyliib di'ic shell of a screen sustained in said shell, an agitator in the shell with spaced bearingtherein, a crank-bar extending through the shell-wall and having a horizontal bearing portion which bears in said shell- .teozeev Wall and which extends through one of the bearing-openings of the agitator said crankbar being also provided with a bowed portion and a bearing-end beyond said bowed portion said latter end being sprung into posi tion to pass through the other bearing-open ing of the agitator and also through an opening at the opposite side ofthe shell. V

3. In a sitter, the combination with a cylindrie shell of a. seini-cylindrio screen in said shell, a crank-bar having two horizontal bearting port-ions and a bowed portion between the two bearing portions, an agitator having a plurality of arms the opposite ends of which are mounted on the two bearing-portions of the crank-bar at the outer sides of the bowed portion thereof and shoulders forn'iedon an arm of the agitator to project in the path of the bowed portion of the crank-bar whereby to drive the agitator.

in testimony whereof I affix mysignature.

CHARLES F. PFALZGRAF. 

